Psalm 18:46

The Lord liveth, and blessed [be] my Rock
This, with what follows, is the concluding part of the psalm, which ends with a celebration of the Divine Being, and with thankfulness for mercies received from him. The psalmist praises him on account of what he is in himself, what he was to him, and had done for him: in himself he is the living God, "the Lord liveth": he has life in himself, essentially, originally, and independently; and is the fountain and author of life to all others, even to all creatures that have life, whether rational or irrational: he is the giver of natural life to all men, and the supporter of it; and of spiritual and eternal life to his chosen people; and he continues to live, and ever will; wherefore the saints may conclude that their life in every sense is safe and secure. Some render the phrase, by way of wish, "may the Lord live" ^F18; but then it must be understood only that he would show himself more abundantly to be the living God, and that he might be acknowledged so by others. The next clauses are by way of petition; "and blessed be my Rock"; on which he was built and established, to which he betook himself in times of distress, which was his place of defence, and from whence he had a supply; wherefore he desires he might be blessed, not by invoking or conferring a blessing on him, neither of which can be; there being none greater than he to call upon, and he being "Elshaddai", God all sufficient, and in no need of any; but by declaring his blessedness, by celebrating his greatness and goodness, and by ascribing blessing and honour and glory to him;

and let the God of my salvation be exalted;
God was the God of his salvation in a temporal sense, saving him daily from his many enemies; and in a spiritual sense, being the contriver, author, and applier of it to him; on which account he would have him be exalted both by himself, and in the high praises of his people; ascribing the whole of salvation to him, and giving him all the glory of it. Some render the words, "the God of my salvation is high" ^F19; he is the most high God, the high and lofty One that inhabits eternity, and is above all others. In ( 2 Samuel 22:47 ) the words are read, "and exalted be the God of the Rock of my salvation".